Improvement in boring-machine



Y To all whom/it 'may concern: i. l' i a p Be it known that I, E. C. BARTON, of Bloomsburg,

pediatria.

O. BARTON, 0F pBLOOMSBURGfPENNSYLVANIA.

Letters Patent No. 98,014, dated December- 21, 1869.

nvmzovmvm'rrrl nr 1apourrie-:writeln mav l'.'l'.1 \e Schedule referred to in these Lettere Patent and making part of the' samer in the county of Columbia, and State of Pennsylvania, haveinvented axnew `and improved Boring-Machine; andlI do hereby declare `that the following is a full, clear, and exact description thereof', which will enable others skilled in the alt"to'niake and use the same, reference being had to the accompanying drawings,

4forming part of this speciiication.

This invention relates to'improvements in woodboring machines, whereby it is designed to provide a simple andethcient arrangement of frame and oper- .ating-devices. i

Figure 1 represents a side elevation of'my improved machine, partly broken out, and

. Figure 2 represents a transverse section of the samen? l Similar letters of reference indicate corresponding parts. l

A represents a box-shaped frame, supported on legs B at each end. t

i The end walls of this frame serve as bearings for a worm-'driving shaft, C, preferably so arranged that the top of ther said worin-shaft is about thegsame height as'the side walls ofthe frame, 4whereon are supported transversely, in suitable' hearings I), one or more boring-niandrels E. having pinions gearing wit-h the wornrshaft. s

The latter Ais driven by a belt, F,f1omthe main driving-shaft G.

The bearings D for the Inandrelsl have yoked ex- 'tensionsD, extending to near the bottom of the frame' i A, which isslotted longitudinally, through which slots holding-screws H screw into the said yokes, to clamp the bearings down tightly upon the top of the frame A, or 4they may be raised up by tbe screws, to carry the pinions of the boring-mandrels out of gear with the `worm-shaft C. The said screws have A collars above and below the bottouiof the frame for holding them,so as to control the yokes. These yokes and ythe bearings may be adjusted along the frame.

The workholding table K is supported onbrackets L, on one side of' the frame A, capable of sliding up and down thereon, and under these Abracketsis placed a slide, M, haring inclined planes N, and an adj listing-v screw0, by which it may be moved back andV forth under the brackets.

vThe movement of the said slide'M one way, forces the brackets up, and the other way, lets them down. In this way the pieces to be boredy may. be. gauged for any required distance from the side lying in the table.

The brackets, or the side of the frameAvlnay be provided with scales, to indicate the distance of the table from the boring-tools. d

Haring thus described my invention,

- What I claim as, new, and desire to secure by Letters Patent, isd The mandrel E and its pinion, the yoke D D', and collared screw-bolt H, iucombination with the worm G and frame A, when constructed, arranged, and oper-A ating substantially as herein shown and described.

` E. O. BARTON.

Witnesses y JL J. RoBBINs, J. R. GROUL. 

